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3 Sheets-Shet 1.

(No Model.)

J SEDLAGEK REFRIGERATING MACHINE.

No. 602,199. Patented Apr'.'1Z, 1898.

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3 Sheets-Sheet 2.

J. SEDLAGEK. RBFRIGERATING MACHINE.

(No Model.)

Patented A r. 12, 1898.

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J. SEDLAOEK'.

REFRIGERATING MACHINE.

No. 602,199. Patented Apr. 12,1898.

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UNITED STATES PATENT FFIQE.

JULIUS SEDLAOEK, OF NUREMBERG, GERMANY.

REFRlGERATlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 602,199, dated April 12, 1898.

Application filed February 26, 1897. serialllo- 625,128. (No model.) Patented in France December 21, 1892, No. 226,556; in Germany February 10,1898,No. 82,733,- in Italy March 28, 1893, No. 1,194; in Austria-Hungary May 6, 1893, No. 1,089 and No. 5,637, and August 30,1893,No. 10,239; in Switzerland July 22,1893, No. 7,363, and June 25, 1894, No. 8,798; in Belgium August 25,1894, No. 85,843, and in England Mayl, 1895, No. 9,530.

,To aZZ whom it may concern.-

Be it known that I, JULIUS SEDLACEK, a subject of the Emperor of Austria-Hungary, residing at Nuremberg, Kingdom of Bavaria,

Germany, have invented a new'and useful Improvement in Refrigerating-Machines, (for which'I have obtained patents in the following countries: Germany, No. 82,733, dated February 10, 1893; Great Britain, No. 9,530,

dated May 14, 1895; France, No. 226,556, dated December 21, 1892; Switzerland, No. 7,363, dated July 22, 1893, andNo. 8,798, dated June 25, 1894; Italy, No. 1,194, dated March 28, 1893; Belgium, No. 85,843, dated August I 5 25, 1894, and Austria-Hungary, Nos. 1,089 and 5,637, dated May'6, 1893, and No. 10,239, dated August 30, 1893,) of which the following is a specification.

My invention relates to an improvement in the class of refrigerating or ice machines in wh1ch a gas liquefiable under mechanical compression, such as ammonia or carbonicac id, is utilized to absorb by expansion the heat from a surrounding body to refrigerate or oongeal the latter.

The primary object of my improvement is to provide means for preventing an excess of pressure of the gas which is forced past or behind the pump-piston by its action beyond the gas-pressure in the suction-chamber; and a further object is to prevent the lubricant for the pump from being forced'by the action of the latter into the suction-chamber.

Referring to the accompanying drawings,

Figure 1 is a view in vertical sectional elevation of a refrigerating-machine provided with my improvement; Fig. 2, a section taken at the line 2 on Fig. 1 and viewed in the direction of the arrow; Fig. 3, a section taken at the 40 line 3 on Fig. 1 and viewed in the direction of the arrow; Fig. 4, a top plan view of the section of the apparatus illustrated by Fig. 2; Fig. 5, a section taken at the line 5 on Fig. 2, viewed in the direction of the arrow and enlarged, or taken at the line 5 on Fig. 6 and viewed in the direction of the arrow; Fig. 6, a section taken at the line 6 on Fig. 5 and viewed in the direction of the arrow; and Fig. 7, a section taken at the line 7 on Fig. 1,

viewed in the direction of the arrow and enlarged,'or taken at the line 7 on Fig. 5 and viewed in the direction of the arrows The machine as shown'is adapted to be operated by hand, though my improvement is applicable to themachine when arranged to be operated by other power.

A is the. condenser.

E is the refrigerator, that shown being of the variety adapted for making ice.

The mechanism of the machine is supported on a suitable bed 0, in which are provided bearings r and r for a rotary crank-shaft D, containing the two cranks D and D Each crank is surrounded by a sleeve D convex on its outer surface to fit the inner concave sides of a rectangular yoke D in which the thimble is confined and which is provided on the outer end of the piston-stem.

The shaft carries at one end means for driving it, shown as a crank wheel W, and

'at its opposite end a beveled gear q, and just beyond-the bearing r there'is provided on the shaft to rotate with it an eccentric 19, carrying at diametrically opposite points the projections p and'piaffording strikers, Fig. 3.

The condenser A is formed with a tank at, rising from the bed 0 and containing the coiled pipe 0. The refrigerator B is formed with a covered tank m, rising from the bed 0 and containinga coiled pipe Z, surrounding a rotatable can E for the water to be congealed, the can being journaled at its bottom in the bed 0 and the journal carrying below the bed a beveled gear g, meshing with the gear q. The coil Z is connected from its upper discharge end with the inlet end of the coil 0 by a suction-pipe la, and the discharge end of the coil 0 is connected by the pipe 0, of reduced diameter, with a pipe Z, aifording the inlet to the will through an interposed valve device F. This valve device comprises ahead 2', containin g the intercommunioating chambers "i and '5 from the last-named of which the pipe I leads, while the pipe 0 leadsinto the chamber 5 In the passage '6 between the two chambers e" and 11 there extends and closely fits therein a reciprocating valve 5 in the form of a stem pivoted between its ends to a lever the pipe Z by the action of the eccentric in.

raising twice in each revolution the rod 19 to raise accordin l the valve 24 out of the fas-.

sage 2' and thereby open the latter, and by turning the screw 7L2 to move the head its to.- ward or from the fulcrum a? the extent of withdrawal of the valve may be decreased or increased according to desire to permit a lesser or a greater discharge ofthe gas.

In thecondenser A and surrounded therein by the coil 0 is the compressor comprising a casting seated at its lower end in the bottom of the condenser afforded by the top of the bed 0 and containing the two chambers g and f, which communicate at their lower ends through the passage b, and the interposed vertical duct or bypass e, which latter leads from. a lubricant-chamber c at its lower end in the passage 1) to a valve-chamber eZcontaining a valve e preferably of the float-valve variety illustrated, the chamber being interposed between the duct and apassage a, communicatin g with the suction-pipe 7a. The passage e and part of the chamber 6 are formed in a head G, covering the chambers g and f.

In the head G are cored out the suction-chamber H, into which the suction-pipe leads, and the discharge-chamber I, from which the discharge-pipe 0 leads to connect with the inlet end of the pipe-coil 0. At opposite ends of the chamber II are provided the inwardlyopening spring controlled suction valves d and d, controlling the gas-supply from the pipe 7.: to the chambers g and f, and at opposite ends of the chamber I are provided the outwardly opening spring controlled discharge-valves c and c, controlling the discharge from the chambers g and f to the pipe 0 In the chambers g and f, respectively, are the pistons g and f on rods 9 and f extending through stuffing-boxes into the chambers and connected at their lower ends with the cranks D and D The opening shown at o in Fig. 1 is for the overflow of the condenser water from the tank n,and at P is shown a pump for injecting the lubricant (as glycerin) into the chamber c, with which the pump communicates through a pipe 8.

From the foregoing description of the mech: anism the operation of the machine will be understood to be that of workingthe pistons g and f" by turning the shaft D to alternately suck gasinto the chambers g and f by their successive downstrokes and to force the gas by their successive upstrokes out through the discharge-pipe 0 and turning the shaft furthermore regulates the supply of gas to the pipe l and rotates the can E. As to the mechanism for these purposes, however, there is no novelty claimed in this connection. .The gas which leaks or forces its way past 'each piston in its downstroke must be removed from underneath the pistons when its pressure reaches that of the pressure in the suction-chamber II. Then the accumulated gas below each piston enters the duct 6 by way of, the chamber 6 and escapes past the ball-valve 6 into the passage e whence it enters the suction-chamber, and any of the lubricant (the level of which is indicated at In; in Fig. 1) that may be. forced through the duct e will raise the valve e against the mouth of the passage 6 and thereby prevent the escape of the lubricant into the suctionchamber. Moreover, the position of thepassage 1) enables the lubricant to afford a seal to the stuffing-boxes for the piston-rods g and f What Iclaim as new, and desire to secure by LettersPatent, is

1. ,In a refrigeratingmachine, the combination with the condenser and refrigerator of a suction-chamber into. which the refrigerator-coil discharges, a discharge-chamber connected with, the condenser-coil, a pair of piston-chambers having valve-con trolled con- ;;nection with said suction-chamber and valve- :controlled connection with; said discharge- Echamber, pistons in said piston-chambers land oil-chambers therein behind the pistons, and a by-pass communicating at one end with said oil-chambers and provided with, a float- ;valve having a seat. above and below it, whereby gas is prevented frompassing from the suction into said oil-chambersand whereby oil is prevented from enteringthe suction, substantially as described.

, 2. In a refrigerating-machine, the combination with the condenser andrefrigerator of a suction-chamber 'into which the refrigerator-coil discharges, a discharge-chamber connected withthe condensercoil, avpair of piston chambers intercommunicating through an oil-chamberat one end and each having a valve-controlled connection with said suction-chamber and a valve-controlled connection with said discharge-chamber, pistons in said piston chambers, and a by-pass leadingfrom said oil-chamber and provided witha float-valve having a seat above and below it, wherebygas is prevented from passing from the. suction into said oil-chamber and whereby oil is prevented from entering the suction, substantiallyas described.

3. In a refrigerating-machi'ne, the combination with the condenser and refrigerator of a compressor seated in thecondenser-tank and surrounded therein by the condenser: coil, said compressor containing the pistonchambers g and f and communicating through an oil-chamber e, the head G of said compressor containing the suction-chamber II into which the suction-pipe k leads, the discharge-chamber I- communieating with saideondenser-coil, the suction-valves d and d and discharge-valves c and c, pistons g and 5 f in said piston-chambers, and a by-pass 0 leading from said oil-chamber to said suctionchamber and provided with a float-valve 6 having a seat above and'below it, whereby 

